Deuteronomy 8:1

1 Ye shall observe to do all the commands which I charge you to-day, that ye may live and be multiplied, and enter in and inherit the land, which the Lord your God sware to your fathers.

Deuteronomy 8:1 Meaning and Commentary

Deuteronomy 8:1

All the commandments which I command thee this day shall ye
observe to do
It is repeated over and over again, to impress it on their minds, and to show the importance and necessity of it, how greatly it was expected from them, and how much it was incumbent on them:

that ye may live and multiply, and go in and possess the land which the
Lord sware unto your fathers;
for their temporal life, and the mercies and comforts of it, the multiplication of their offspring, and of their substance, their entrance into the land of Canaan, possession of it, and continuance in it, all depended on their obedience to the commands of God; see ( Deuteronomy 19:20 ) .

Deuteronomy 8:1 In-Context

1 Ye shall observe to do all the commands which I charge you to-day, that ye may live and be multiplied, and enter in and inherit the land, which the Lord your God sware to your fathers.
2 And thou shalt remember all the way which the Lord thy God led thee in the wilderness, that he might afflict thee, and try thee, and that the things in thine heart might be made manifest, whether thou wouldest keep his commandments or no.
3 And he afflicted thee and straitened thee with hunger, and fed thee with manna, which thy fathers knew not; that he might teach thee that man shall not live by bread alone, but by every word that proceeds out of the mouth of God shall man live.
4 Thy garments grew not old from off thee, thy shoes were not worn from off thee, thy feet were not hardened, lo! these forty years.
5 And thou shalt know in thine heart, that as if any man should chasten his son, so the Lord thy God will chasten thee.

The Brenton translation of the Septuagint is in the public domain.